Lenovo-Linux-Conservation-Mode

Some Lenovo laptops support Conservation Mode, where the battery stops charging after 60% to reduce charge cycle wear.

While this feature is exposed to Linux users, it is not the easiest thing to configure, especially when you want to toggle it frequently.

Lenovo-Linux-Conservation-Mode provides a more convenient way to toggle Conservation Mode in a Linux environment.

Contributing to the tested device list is welcome! Feel free to create a PR and I will merge it in.

Software Requirements

• TLP by linrunner is installed
  • Make sure TLP is properly installed and conflicting packages are removed
• Make sure /etc/tlp.conf does not have STOP_CHARGE_THRESH_BAT0 flag
• Make sure /etc/tlp.d/ does not contain configurations that have STOP_CHARGE_THRESH_BAT0 flag

Hardware Requirements

• Lenovo laptops that support Conservation Mode

• To test if your hardware is compatible

  • Install tlp

  • Run tlp-stat -b with root privilege

  • Look for conservation_mode

  • Example output

    --- TLP 1.5.0 --------------------------------------------
    
    +++ Battery Care
    Plugin: lenovo
    Supported features: charge threshold
    Driver usage:
    * vendor (ideapad_laptop) = active (charge threshold)
    Parameter value range:
    * STOP_CHARGE_THRESH_BAT0: 0(off), 1(on) -- battery conservation mode
    
    /sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode = 1 (60%)
    

Note: Lenovo ThinkPad laptop users might have support for tpacpi or tpsmapi. If you are looking for them, you may want to look elsewhere.

Instructions

1. git clone to a convenient directory
2. cd Lenovo-Linux-Conservation-Mode
3. To enable Conservation Mode, execute ./enable-conservation-mode.sh with root privilege
4. To disable Conservation Mode, execute ./disable-conservation-mode.sh with root privilege

Deep Dive

1. Configurations are set in /etc/tlp.d/99-conservation-mode.conf
2. Previous configuration will be backed up when the script is run
3. STOP_CHARGE_THRESH_BAT0="0" or STOP_CHARGE_THRESH_BAT0="1" flag are set in the config file
4. tlp is refresh automatically
5. tlp-stat is shown for debug purpose

Tested Devices

• IdeaPad 5 Pro Gen 6 14' 82L7006CMJ
• IdeaPad 5 Pro Gen 8 14' 83AM001DCK
• Legion 5 (15ACH6H)
• IdeaPad S145-15IWL
• Yoga C740-14IML 81TC005KAU
• IdeaPad Slim 5 14IAH8 83BF005GFR

References

1. TLP Official Repository https://github.com/linrunner/TLP
2. TLP Official Installation Guide https://linrunner.de/tlp/installation/
3. TLP 1.4 Test: Battery Care for Lenovo Laptops (non-ThinkPad series) https://gist.github.com/linrunner/4a6876648765fac5e141f15d0582a945